Spiderman is a Marvel movie. Those DC movies are inconsistent only because sometimes a series may not be popular (e.g. the George Clooney trilogy) and as such it was rebooted by Christopher Nolan in the Dark Knight trilogy. The Superman trilogy, on the other hand, was widely successful, and so they rebooted it for that reason to make more films with better special effects of current technology. DC is now in the works for a more consistent Justice League universe.